The secret of the new Iridium IX candle lies in the laser welding iridium electrode. Through its & quotminimal & quot; diameter of only 0.6 mm, the ignition voltage joins. The advantages of Iridium IX spark plugs at a glance The optimal ignition properties of Iridium IX spark plugs prevent fouling in stop and go traffic. Backfire or misfiring can be prevented. This reduces emissions and saves (if any) the catalyst and the environment. The Iridium IX spark plugs ensure "round" engine operation, enhance the driving experience through better acceleration and thus offer greater driving pleasure. The Iridium IX candle lasts at least twice as long as a normal candle. Frequent candles change are so & quotout & quot. Which in turn reduces costs. Maximum ignition reliability, uniform combustion, optimum engine performance, throttle response are the result of modern technology and reduce fuel consumption. The optimized shape of the electrode reduces the ignition voltage, protects the engine and ensures a & quot turning & quot; operation.